<!doctype html> 
<html> 
<head> 
    <meta charset="utf-8"> 
    <title></title> 
</head>
<body>
<script type="text/javascript">
	
var a  = function(){};
var b = a;
var c  = function(){};
alert(a == b); //true
alert(c == b); //false


</script>


</body>
</html>